Electrochemical Synthesis of Nano-LiAlO_ 2 Precursor

Nano-LiAlO_ 2 precursor [LiAl(OEt)_ 4-n (acac)_ n] was synthesized by electrochemical dissolution on aluminum anode at 0.2 A for 6 h with 180 mg Li slice in solution of 100 mL ethanol and 0.9 mL acetyl-acetone. The precursor was characterized by IR, XRD, TEM ang TG-DTA. The current efficiency exists over 90% using 35 mmol·L -1 Bu_ 4NBr as a conductive additive at 50 ℃ in the electrochemical reaction. Xerogel of the precursor with the yield of 94.8% was obtained by hydrolyzation of the precursor with concentration of 300 mmol·L -1 and pH=9.0 at 40 ℃ for 6h, and the size of xerogel was in the range of 20 nm~30 nm. nano-LiAlO_ 2 particles were easily prepared by calcinating the xerogel at 550 ℃.